Instead I received WD Black ( 7200 RPM ) 3.0 TB HDD which is good because it is twice the price except 2 things.

It is Recertified & thus not brand New.

Also whoever owned it didn't know that it should be initiated as a GPT & not MBR. So it is formatted as a MBR with 4 partitions & 3 of them total only to 2.0 TB & 4th is useless. 4th Partition can not be created as a volume OR be deleted.Here are the Partitions as shown in Disk Management :

48.83 GB Unallocated ( Right clicking gives an option to create new volume )697.68 GB Free Space ( Right clicking gives an option to create new volume OR Delete Partition )1301.5 GB Unallocated ( Right clicking gives an option to create new volume )746.52 GB Unallocated ( Right clicking this does not give any options such as delete partition or Create new volume

The obvious answer is to return it which is going to be a hassle now.

OR

Can I still initiate it as GPT to avail full 3.0 TB Capacity & if yes, how do I do that ?